invalid conversion from 'wxTextCtrl*' to 'wxChar

I am trying to create a GUI tool for a program using wxwidgets but have run into problems and am completely confused. It says that I am converting between wxTextCtrl* and wxChar. Any help would be much appreciated.

The error message is clear enough. So do not disturb the forum and check the code where you are trying to assign wxTextCtrl* to wxChar. Or you have not enough brain that to understand that these two types are different?!!!